Self-Sticking Pipe Marker for pipes 3/4" to 2 3/8" OD, meets the requirements of the ASME (ANSI) A13.1 Standard for the identification of piping system contents when used with directional flow arrow tape (sold separately). The self-sticking pipe marker is made of durable vinyl material and is ideal for indoor and outdoor environments. The pipe marker can be used in either a current facility or new construction. The pipe label marking is designed for use on clean, dry pipes, -40°F to 180°F (-40°C to 82°F).